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77julia77 [94]
3 years ago
13

Solve the simultaneous equations. xy = 4x + y = 5​

Mathematics
2 answers:
lozanna [386]3 years ago
6 0

Answer:

1,4

4,1

Step-by-step explanation:

y = 4/x

substitute

x + 4/x = 5

multiply the whole thing by x to make life easier

x^2 +4 = 5x

X^2 -5x +4 = 0

(x-1)(x-4)=0

x-1=0 x =1

x-4 =0. x=4

so there are 2 solutions

x=1. y = 4

x =4. y =1

Maru [420]3 years ago
5 0
Answer:
if X=1 ; Y=4
if X=4 ; Y=1
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